Operating device for milking-machines.



PATEN TED APR. 30, 1907.

B. & F. LJUNGSTROM.

APPLICATION FILED JAN. 24, 1907.

14 TTORNEVS.

OPERATING DEVICE FOR MILKING MACHINES.

UNITE SATES PATEN T BIRGER LJUNGSTROM ANT) FREDR 1K SWEDEN I Prion.-

STOCKHOLh l, SWE- OPERATING DEVICE FOR NHLKlNG-IVIACHINES.

Application filed January 24,

To all whom it may concur/1 Be it known that we, BIRGER LJL'xcs'rnoii and EREDRIK LJUNGSTROM, subjects of the King of Sweden, and residing at Flemingga- Z tan 8,Stockholin, S\veden,liave inventedccrj tain new and useful Improvements in er- Q ating Devices for Milking-Machines; ant we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to l which it appertains to make and use the same, reference being had to the accompanyl ing drawings, and to letters or liguies of ieteience marked thereon, which form a part of this specification. l The present invention relates to improve l merits i n such operating devices for milking 5 machines that consist of wires or rods, having a. reciprocating motion and being connected with a pump, by which lluid isiorced at fixed intervals to the milking portions of the machine, thereby actuating them to press'upon the teats.

Our invention has for its object to avoid the inconvenience which arises in such 0 erating devices thereby, that the fluid leaks which, if the quantity of the' were not refilled again, would to give an end pressure,

lluid leaked out cause the pump which would diminishlor each stroke of the I piston According to the present invention I the said inconvenience is avoided thereby, that the pump-cylinder s connected with a fluid receptacle by means of a suction and a force valve. Through the suctionvalve a small quantity is for each stroke of the piston sucked from the receptacle 'into the pumpcylinder and it too great a quantity of fluid l has passed through said valve, a part of it is forced out through the force valve during the next stroke.

"Our invention further has for its object to avoid the inconvenience arising therefrom, that some cows are hard-milked and others are loose-milked." This is 8,GCOIIlplished by holding the force valve on its seat by means of a weight or a spring, whose pressure may be regulated in any suitable way, for instance by means of a shrew. By regulatingthe pressure on the valve, the end I pressure in the pump cylinder will be regulated and thus also the end pressure in the milking organs and on the teats.

Specification of Letters Patent.

.ZREEHI-GQ'API'IA 30, 1907. 1:107' Serial No. 353.932

Our invention further has for its object to connect the liquid conduit with the pump by means of a coupling,which makes the pump loose from said conduit, as soon as there is a draft in it.

The invention is shown on the annexed I drawing.

Figure l is a longitudinal section of the pump and Fig. 2 is an end view.

in the Figs. (1 and b are two wires or rods,

the one being fixed and the other having a wires moving,

reciprocating motion or both in opposite directions.

0 is a cylinder which is more or less filledfor instance water, and which with a fluid, is provided with two ends (1 from which the ears e project. In the middle of the cylinder there is a projecting lugf, which is provided with a groove, wherein the wire a fits and is further provided with a wing-screw g, by means of which the wire a may be secured in. the groove.

In the cylinder 0 there is arranged a pumpcylinder It, wherein the pistoni with the piston rod dL' can move. Said piston rod lc is connected with an arm 1, which, carrying the grooved lug p by means of the wing-screw m can be rigidly secured to the wire 12.

From the end of the pump cylinder 12. a mouth-picce n projects, which, by means of device, described below, can be coupled to the conduit leading to the milking machine. At the same end of the pump cylinder /L there is arranged inside the cylinder 0 a valve housing 0, containing a suction valve and a force valve. The former consists of a small cham her 1*, wherein a disk s nearly filling up the whole chamber, is arranged. Said chamber communicates with the cylinder]; by means of a narrow channel t and with the cylinder a by the hole a. By forming the suction valve in this way only is sucked into the pump cylinder /1 for eac stroke of the piston i. If too great a quail-- tity should be sucked into the pump cylinder in a part of said quantity will be forced out through the force valve. Said t'orceyalve consists of a disk 1 covering the mouth of the channel 2, by which the force chamber 225 communicates with the pump cylinder IL. The disk 1 is pressed against its seat by means of a spiral spring 3, which-abuts disk 4 and acts to press the against the upper a very small quantity of fluid der themoment before, a part of the liquid will escape through the force valve, so that the maximum pressure, with which the pump is intended to work, cannot be exceeded. The said maximum pressure can be regulated for hard-milked or loose-milked cows by regulating the tension otthe spring This is accomplished, preferably, by connecting the disk 4 with a lever 5 turning on a pivot 6 and provided with a bored lug 7, through which the threaded bolt 8 passes. is a nut, abutting against the lug 7, and moving on the bolt, when it is turned. bolt, which is journaled in the end (1, is connected with an arm 9 turning over a scale on the surface of the end d. By means of this device the disk 4 can be screwed nearer to the disk 1, whereby said disk on account of the greater pressure thereon of the spring 3, will hold the opening of the channel 2 closed with a greater force, so that the maximum end pressure in the cylinder h, when the piston reciprocates, will be greater than before. The end pressure in the cylinder h for each stroke of the piston can in this way be regulatedand on account thereot'the end pressure in the milking machine and the end pressure of the milking organs on the teats.

The pump is secured to the Wires (1 and b in the following Way: The receptacle 0 is hooked on thewire a by means of the ears e and is then secured to said wire by means of the screw 9. The wire I; is then placed in the lug 1) and the screw m is screwed down so as to just abut against the wire. When the wire b reciprocates,'the arm Z will abut against the end surfaces 10 and 11 of the opening in the mantle of the pump cylinder and the lug p will then slide on the wire, until the arm Z contacts with either the surface 10 or 11. Then the screw m. is screwed down tightly. In order toconnect the pump with the liquid conduit so that they are disconnected as soon as there is a draft in theconduit, is used a coupling of a special construction. The mouth piece n is surrounded by a shell l.4, having projecting springing arms 13, the ends of which are curved or swelled, so as to inclose the swelled head of a metal tube 12, which ends the conduit. When the end of said tube 1'2 abuts against the end of the mouth-piece n, the springing arms 13 grasp over the head of the tube 12 and hold it in position.

Having now fully described our invention, what we claim and desire to protect by Letters Patent is:

1. In pump operating devices for milking The machines, in combination, wires having a relative reciprocating motion, a pump connected therewith and a lluid receptacle, communicating with the pump cylinder, a suction valve and a force valve controlling the communication between the pump cylinder and receptacle.

2. ln pump operating devices for milking machines, in combination, wires having a re ciprocat-ing motion in relation to each other, a pump connected therewith and a fluid receptacle, inclosing said pump and communieating with the pump cylinder, a suction and a force valve controlling the communication between the pump cylinder and receptacle.

' 3. In pump operating devices for milking machines, in combination, wires having a relative reciprocating motion, a pump cylinder, connected with the one wire, a piston in the said cylinder, connected with the other wire, a fluid receptacle, inclosing said cylinder and communicating therewith, a suction valve and a force valve controlling the communication between the pump cylinder and receptacle.

4. In pump operating devices for milking machines, in combination, wires having a relative reciprocating motion, a pump connected therewitl'i and a fluid receptacle, communicating with the pump cylinder by meat-s of a suction valve, and a force valve controlling theconnectidn between the pump cylinder and receptacle, and means to produce and regulate pressure upon the force valve against movement to open.

5. In pump operating devices for milking machines, in combination, wires having a relative reciprocating motion, a pump connected therewith and a fluid receptacle, communicating with the pump cylinder a suction valve, and a force valve controlling the communication between the pump cylinder and receptacle, and a spring acting upon the force valve.

6. In pump operating devices for milking machines, in combination, wires having a relative reciprocating motion, a pump cor.- nected therewith and a fluid i eceptacle, communicating with the pump cylinder, a suction valve, and a force valve controlling the communication between the pump cylinder r (1. receptacle, a spring acting upon the lorce valve, and means to vary the power ol" said spring.

7. 1n pump operating devices for milking machines, in combination, Wires having a relative reciprocating motion, a pump connected therewith and a fluid receptacle, communicating with the pump cylinder, a suction valve, and a force valve controlling the communication between the pump cylinder and receptacle, spring acting upon the lorce'valve, a device, exterior of the apparatus, for varying the power of the spring and connection between the device and spring.

v 8. 1n pump operating devices for milking machines, in combination, Wires having a relative reciprocating motion, a pump connected therewlth and-a fluid receptacle, communicating with the pump cylinder by means of al suction valve, and a force valve controlling the connection between the pump cylinder and receptacle, and means to produce pressure upon the wee valve.

9. ln pump operating devices for milking machines, in combination, wires having a relative reciprocating motion, a pump connected therewith and a fluid receptacle, communicating with the pump cylinder, and a disk covering the opening by which the pump cylinder communicates with the liquid recepmachines, in combination, wires having a relative reciprocating motion, a pump connected therewith and a fluid receptacle, communicating with thepump cylinder, a disk, clos ing an opening by which the pump cylinder communicates with the fluid receptacle, pressure means tending to hold said valve on its seat, and means to vary the power of said pressure means.

12. In pump operating devices for milking machines, in combination, wires having a relative reciprocating motion, a pump connected therewith and aiiuid receptacle, communicating with the pump cylinder, a disk, closing an opening by which the pump cylinder communicates with the -fluid receptacle, and a spring acting on said disk to ,press it against its seat.

13. In pump operating devices for milking machines, in combination, wires having a re]- ative reciprocating motion, a pump connected therewith and a fluid receptacle, communicating with the pump cylinder, a disk, closing an opening by which the pump cylinder communicates with the fluid receptacle, and a spring acting on saiddisk to press it against its seat, and means to vary the power of said spring.

Y 14. In pump operating devices for milking machines, in combination, wires having a relativereciprocating motion, a pump connected therewith and a liquid receptacle communicating with the pump cylinder, a force valve, consisting of a disk, closing an opening by which the pump cylinder communicating with the fluid receptacle, a spring pressing said valve on its seat abutting with'one end against the disk, a second disk against which the other end of said spring abuts, a lever extending to the exterior of the apparatus to which said second disk is connectcdwhereby the space between said disks may be varied, varying the power of the spring.

15. in pump operating devices for milking machines, in combination, Wires having a relative reciprocating motion, a pump connected therewith and a fluid receptacle, commu-' nieating with the pumpcylinder, a disk, closing an opening by which the pump cylinder communicates with the liquid receptacle, a spiral spring, abutting with one end against said disk, a second disk against which the other end of the spring abuts, a leverconnected with said second disk, a screw, engaging the end of said lever, said screw being journaled in the bottom of the liquid receptacle, and an arm connected with the screw and moving over a scale.

In testimony of which invention, we have hereunto set our hands, at Stockholm, on this 9th day of January, 1907.

emcee LJuNes'r ton. FREDBIK LJUN GSTROM. Witnesses: HJAHUM ZELTERSTRQM, HARRY ALBIHN. 

